Bill Monroe was the first performer to bring the virtuosic side of country music to the general public. His instrumentation of fiddle, mandolin, banjo, guitar, and string bass performed rhythmically tight virtuosic music, more reminiscent of jazz than of anything that had been heard in country music before. What genre was his music labeled

"Bluegrass" genre was his music labeled.

Explanation:

An American heritage musical style that originated in the Appalachian portion of the United States throughout the 1940's is titled as "Bluegrass Music". The artists band like Bill Monroe and the Blue Grass Boys derived its title from such genre. This style has origins in traditional British, Scotland and Irish ballads and dance songs, and also rooted from blues and jazz of African-American. There are 3 significant Bluegrass subgenres:

The subgenre where instrumentalists having folk songs, performing tunes with conventional chord progressions and playing acoustic instruments, is understood as traditional bluegrass. The bluegrass gospel is which follow Christian music, a soothing 3 - or 4-part harmony singing, and eventually playing instrument. A younger trend in the bluegrass style is neo-traditional bluegrass which is illustrated by the bands like the Mountain Heart and Grascals.